dtsjq28482
dtsjq28482
2017-02-21 15:37
浏览 80

如何通过iframe将php变量传递给javascript

I am trying to pass a php variable value, through an iframe over to a javascript variable. All files are on my own server and domain.

This is my html file:

<html>
<head>
    <?php 
        $userOutput = "bob"; 
    ?>
</head>
<body>
    <p id="test123"><?=$userOutput?></p>
</body>
</html>

And in my original page i try to access the information like this:

<iframe id="iframeId" src="http://path/to/file.html"></iframe>
<script>
   window.onload = function() {
      var iframeDoc = document.getElementById('iframeId').contentWindow.document;
      var test = iframeDoc.getElementById('test123').value;
      console.log(test);
   };
</script>

Now, i do manage to reach my content, and i have tried before to just get the value of some input field i put in my "file.html" with success, but i can't seem to reach the php variable value ("test" shows up as undefined)

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2条回答 默认 最新

  • dongxun7962
    dongxun7962 2017-02-21 15:59
    已采纳

    So anything that holds php needs to go into a .php file rather than a .html

    as an example:

    variableStored.php:

    <html>
    <head>
        <?php
        $userOutput = "Frrrrrrr";
        ?>
    </head>
    <body>
        <p id="test123">
            <?php echo $userOutput; ?>
        </p>
    </body>
    </html>
    

    Take Note: when echo'ing out, its always best to <?php echo 'something';?>

    rather than <?='something'?>

    Then within lets say iframe.html:

    <iframe id="iframeId" src="http://siteurl/variableStored.php"></iframe>
    <script>
        window.onload = function() {
            var iframeDoc = document.getElementById('iframeId').contentWindow.document;
            var test = iframeDoc.getElementById('test123').value;
            console.log(test);
        };
    </script>
    

    This will then fetch everything from variableStored.php as you want it to.

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  • donglijuan8227
    donglijuan8227 2017-02-21 15:44

    You could echo your variable in a Javascript variable like

    <script>var test = "<?= $variable ?>";</script>
    

    And pass the variable as GET parameter to your iframe.

    <script>
            var url = "myIframe.html?var1=" + test; 
            $('#myIframe').attr('src', url"); 
    </script>
    

    You can then retreive the info using

    <script>
    function getParamValue(paramName)
    {
        var url = window.location.search.substring(1); //get rid of "?" in querystring
        var qArray = url.split('&'); //get key-value pairs
        for (var i = 0; i < qArray.length; i++) 
        {
            var pArr = qArray[i].split('='); //split key and value
            if (pArr[0] == paramName) 
                return pArr[1]; //return value
        }
    }
    </script>
    

    I want to give credit to @Ozgur bar for his answer here. How to pass parameters through iframe from parent html?

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